[Accuracy evaluation of static guided implant placement using an intraoral scan method].

Purpose: To evaluate the accuracy of static guided implant placement with intraoral scanning technology and to analyze the influencing factors of guided surgery.

Methods: Totally 27 cases were included in this retrospective study. The implant designs were made in 3Shape Implant Studio and then guided implant surgeries were performed with CAD-CAM templates.

[Nonradiological methods for implant surgical guide accuracy measurement].

Purpose: To evaluate the accuracy of static computer-navigated implantation with surgical guides, based on a non-radiological method. Traditional measurements with a second cone-beam CT (CBCT) were applied to verify the accuracy.

Methods: A total of thirty template-guided implantations were designed and performed on 15 resin models.

[Study on cushioning and energy absorption of sports mouthguard].

Purpose: Using impact test to study cushioning and energy absorption of sports mouthguard of different thickness, material and combination.

Methods: According to the thickness, material and combination, the mouthguards were divided into 7 groups with 6 testing pieces in each group. A pendulum device was used to apply impact energy to the mouthguard and dentition model, and the magnitude of the impact energy was measured by changing the release height of the pendulum.

[Effects of dimethylamine tetracycline combined with tea polyphenols on the levels of IL-1β and IL-17F in patients with early peri-implant soft tissue inflammation].

Purpose: Using impact test to study energy absorption ability of mouthguard splints of different thickness and materials.

Methods: In this experiment, group 1 was BIOPLAST 5 mm splint, group 2 was BIOPLAST 4 mm splint, group 3 was BIOPLAST 3 mm splint，group 4 was BIOPLAST 2 mm splint and group 7 was BIOPLAST 1 mm splint. Group 5 was ERKOLOC-PRO 2 mm splint, group 6 was DURAN 2 mm splint.

[Study on energy absorption of mouthguard splints by impact test].

Purpose: Using impact test to study energy absorption ability of mouthguard splints of different thickness and materials.

Methods: In this experiment, group 1 was BIOPLAST 5 mm splint, group 2 was BIOPLAST 4 mm splint, group 3 was BIOPLAST 3 mm splint，group 4 was BIOPLAST 2 mm splint and group 7 was BIOPLAST 1 mm splint. Group 5 was ERKOLOC-PRO 2 mm splint, group 6 was DURAN 2 mm splint.

[Study of the timing of tooth movement after repair of alveolar bone defects by rabbit BMSCs combined with beta-TCP].

Purpose: To investigate the effect of tooth movement at different time after repair of alveolar bone defects with tissue engineering bone constructed by rabbit bone marrow mesenchymal stem cells (BMSCs) and beta-tricalcium phosphate (β-TCP).

Methods: Alveolar bone defect (6 mm×4 mm×8 mm) was made on the right side of 40 New Zealand rabbits, which was filled with tissue engineering bone constructed by BMSCs and β-TCP as experimental sides. Tooth extraction on the other side was performed as control.